num_classes = 3
num_epochs = 500
image_size = 640
strides = [4,4,8,8,16,32,32,32]
feature_maps = [159,159,79,79,39,19,19,19]
scale_factors = [15, 20, 40, 70, 110, 250, 400, 560]
scales = [(10,15),(15,20),(20,40),(40,70),(70,110),(110,250),(250,400),(400,560)]
